Scientific Desktop Apps Turn to Java DB!
The authors who praise Derby also express a wish for in-memory storage, which is now part of Derby 10.5 and will soon appear in Java DB 10.5 for distribution with the JDK.
(Unfortunately, some of the other posts on the forum have some errors in them. I won't waste anytime here to try to address these errors as I'm sure the forum postings will eventually lead the reader in the right direction, in this particular case.)
So, for developers of these types of applications, the most important point of interest is the fact that Java DB 10.5 (based on Apache Derby 10.5) will now support in-memory storage. With Java DB 10.5, the Java DB distribution with the JDK will continue to be a boon for middle tier, desktop, rapid prototyping, sensing and testing applications in need of structured data--if not for a greater set of applications.